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The decision appears to be an attempt to increase the pressure on the state government to follow through on a so-called "secret deal" to reduce the company's royalties in the first seven years of the mine's operation.

Under the deal, Adani would reportedly only pay $2 million in royalties annually, which could end up costing taxpayers $320 million in lost royalties.

After her deputy Jackie Trad, a member of the Left, had opposed such a deal, Ms Palaszczuk admitted the measure hadn't been put to cabinet as expected.

"Our main focus today was on the budget that is going to handed down next month, focused on jobs," she told reporters.

Speaking before cabinet earlier in the day, Ms Trad said any such deal would break an election promise.

"We've got a pre-election commitment in relation to any subsidisation of Adani and we made that commitment very clearly at the last state election, that there would be no royalty holiday or subsidisation of taxpayer funds for Adani," she said.

"Having said that, I am part of a government that has made sure all of Adani's statutory licensing arrangements have been pursued, so that the mine can get on and open and employ people."

The LNP opposition slammed the government, saying it had put the whole project in jeopardy over a factional fight that pitted "Palaszczuk versus Trad".

"This is putting thousands of Queensland jobs at risk. This is putting billions of dollars of investment at risk," LNP leader Tim Nicholls told reporters.

"Labor have continually bungled this project. They've delayed and deferred it, and the people who are paying the price are Queenslanders looking for jobs."

The Carmichael project is expected to create hundreds of jobs but has been fiercely opposed by environmental groups.

Main Roads Minister Mark Bailey, a member of the Left, said there was a "positive and collegiate" discussion in cabinet about the issue but no decision was reached.